Several new approaches for extending recommendation technologies to incorporate and leverage multicriteria rating information are presented. Personalization technologies and recommender systems help online consumers avoid information overload by making suggestions regarding which information is most relevant to them. Recommender systems are usually classified according to their recommendation approach including, content-based approaches, collaborative filtering, and hybrid approaches. The overall rating that users give to an item provides the information regarding how much they like the item, and multicriteria ratings provide some insights regarding why they like it. Therefore, multicriteria ratings enable more accurate estimates of the similarity between two users. A new method is proposed to extend the standard collaborative-filtering algorithm to include multicriteria rating.
Bibliographical noteFunding Information:
The US National Science Foundation supported part of the research reported in this article under grant IIS-0546443.